with the noticeably hoarse voice -- >> we know we have or work to do. >> reporter: mitt romney made a clean sweep. that's where he focused his energy today. >> accomplishing real change is not something i talk about but something i've done. >> reporter: the national race is tight. each campaign is projecting confidence in the ground games. >> they both believe it's all about turnout. >> reporter: both candidates are campaigning in a state with sentimental iowa. the victory in iowa almost launched his chance to the white house. karen traveers -- abc2 news chicago. >> we have more. >> it all comes down to this, the time full day of campaigning before election night. republican challenger mitt romney is on a whirlwind. >> you want four more years like the last four years or do you want real change. >> reporter: no state is bigger than ohio. >> ohio, florida and virginia. mitt romney has to basically go three for three in those states. >> in fact both candidates are campaigning in columbus today. president obama is also vowing support in iowa and wisconsin. if he takes those states and oh